The world’s oldest Sherlockian society gathering since 1934.

A light grey silhouette of a man in profile smoking a pipe.
BSI members holding their investiture certificates
About the BSI

You come for Sherlock.
You stay for the friendships.

The Baker Street Irregulars is an international literary society and 501(c)(3) nonprofit dedicated to the study of Sherlock Holmes, Dr. Watson, Sir Arthur Conan Doyle, and the Victorian world.

Founded in 1934, we are the oldest Sherlockian society in existence. Our members have distinguished themselves through scholarship, writing, and decades of dedication to the Canon. But you don’t need an invitation to be part of what we do. The world of the BSI is open to anyone who loves Holmes.

The Baker Street Journal

The premier journal of Sherlockian scholarship since 1946.

Cover of the 2025 Baker Street Journal Christmas Annual
Cover of the Autumn 2024 Baker Street Journal
Vintage Baker Street Journal cover
Cover of the Winter 2025 Baker Street Journal
The latest from 221B

News & Updates

BSI Press

Sherlockian scholarship, in print since 1948.

The BSI has published nearly 100 volumes related to Sherlock Holmes since 1948. These include reproductions of the handwritten manuscripts with associated chapters on interesting aspects of the stories, collections of papers by international writers, the history of the BSI, and books covering a wide range of other Sherlockian topics.